8th Science EOG Review - Chemistry

Which is the best example of a pure substance?

• peanuts

• gold

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NGSS.MS-PS1-4

Which best explains how periods on the periodic table are organized?

• increasing atomic number from left to right

• increasing number of neutrons from left to right

An ice cube is put into a heated pan. What will most likely happen to the molecules in the ice as the ice is heated?

• The molecules will begin to move slower.

• The molecules will begin to move faster.

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NGSS.MS-PS1-4

Which best explains why the total mass of the products would be less than the total weight of the reactants after a chemical reaction?

• Gases were released into the atmosphere.

• Precipitates were created in the new solution.

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NGSS.MS-PS1-5

NGSS.MS-PS1-2

Which pair of elements has the most similar properties?

• Al and F

• N and P

If a chemical reaction such as photosynthesis begins with 6 atoms of Carbon (C), how many atoms of Carbon (C) should be in the products?

• 12 atoms of Carbon (C)

• 6 atoms of Carbon (C)

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NGSS.MS-PS1-5

The table shows properties of several elements. Which element would Element X most likely be groups with on the periodic table?

• potassium

• copper

Which shows one example of a physical change and one example of a chemical change?

• boiling water and shredding paper

• freezing water and burning coal

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NGSS.MS-PS1-4

NGSS.MS-PS1-5

How does a balanced chemical equation satisfy the Law of Conservation of Mass?

• During a chemical reaction, the total amount of matter stays the same

• During a chemical reaction, one or more new substances are formed

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NGSS.MS-PS1-5

This chart describes an experiment using a sample of water and three solids made of different substances. Which property of water is being tested?

• solubility

• buoyancy

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NGSS.MS-PS1-2